ABB REX 521, Техническое справочное руководство, общее

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1MRS 751108-MUM Protection Relay
Technical Reference Manual, General
REX 521
25
4.1.12.4. SPA bus
The SPA bus protocol uses an asynchronous serial communication protocol (1 start
bit, 7 data bits + even parity, 1 stopbit). Adjustable parameters are “Baud rate”
(default 9,6 kbps) and “SPA address” (slave number). The communication
parameters for the front and the rear communication ports can be set individually.
The SPA bus protocol is sending events using event mask 1 (“V101” parameter of
each function block). The SPA event buffer stores the first 50 events.
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In the case of longer transmission distance e.g. between MicroSCADA system and
a substation, a following (Fig. 4.1.12.4.-2) system configuration is recommended.
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I
SPAC 331 C
spasysrex
C
E
F
I
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MicroSCADA
SPA-ZC22
SPA-ZC21 RER 103
REX 521 SPACOM REF 54_ REX 521
Optical SPA-bus
COM-port (RS 232)
SPA-bus
COM-port (RS 232)
Protocol X
REXFRONT
C
E
START READY TRIP
FEEDER PROTECTION REX 521
Order No: REX521 AMHPL
Serial No: 000001
Uaux = 110-240 Vac
Uaux = 110-220 Vdc
fn = 50/60 Hz Un = 100-120 V
In = 1/5A, 0.2/1 A (Io, Iob)
In = 1/5A
REXFRONT
C
E
START READY TRIP
FEEDER PROTECTION REX 521
Order No: REX521 AMHPL
Serial No: 000001
Uaux = 110-240 Vac
Uaux = 110-220 Vdc
fn = 50/60 Hz Un = 100-120 V
In = 1/5A, 0.2/1 A (Io, Iob)
In = 1/5A